Length

Description

This operation counts the number of elements in the map and returns the total.

Method

Objective-CSwift

[[[Backendless.shared hive:(NSString *)hiveName] mapStore:(NSString *)keyName] lengthWithResponseHandler:^(NSInteger)responseHandler errorHandler:^(Fault *)errorHandler];

Backendless.shared.hive(hiveName: String).mapStore(keyName: String).length(responseHandler: ((Int) -> Void)!, errorHandler: ((Fault) -> Void)!)

where:

Argument	Description
hiveName	Name of a hive where the operation is performed. String value.
keyName	Key name identifying a map. String value.

Return Value

The total number of items stored in the specified map.

Example

The example below returns the total number of items stored in the "fruits" map.

Objective-CSwift

[[[Backendless.shared hive:@"groceryStore"] mapStore:@"fruits"] lengthWithResponseHandler:^(NSInteger response) {
    // handle response
} errorHandler:^(Fault *fault) {
    // handle error
}];

Backendless.shared.hive("groceryStore").mapStore("fruits").length(responseHandler: { response in
    // handle response
}, errorHandler: { fault in
    // handle error
})

where:

Argument	Description
"groceryStore"	Name of a hive where the operation is performed.
"fruits"	Key name identifying a map.

Codeless Reference

where:

Argument	Description
hive name	Name of a hive where the operation is performed.
key name	Key name identifying a map.

Returns the total number of items stored in the specified map.

Consider the following Map storage:


The example below counts the number of values in the "fruits" map:

The output will look as shown below after the Codeless logic runs.